我正在通过以下链接访问API：https://covid19-brazil-api.now.sh/api/report/v1/brazil/20200425/
此链接的最后一部分对应于特定日期在巴西所有州的冠状病毒数据（该链接的最后一部分代表，在此情况下为04/25/2020）
我只想查看一种状态的信息，但是JSON格式化的方式有一大堆称为date的对象，所以我不能这样做：
https://covid19-brazil-api.now.sh/api/report/v1/brazil/20200425/?uf='PE'
这是JSON：
// 20200428215028
// https://covid19-brazil-api.now.sh/api/report/v1/brazil/20200425/
{
"data": [
{
"uid": 35,
"uf": "SP",
"state": "São Paulo",
"cases": 20004,
"deaths": 1667,
"suspects": 5334,
"refuses": 596,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 33,
"uf": "RJ",
"state": "Rio de Janeiro",
"cases": 6828,
"deaths": 615,
"suspects": 1254,
"refuses": 148,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 23,
"uf": "CE",
"state": "Ceará",
"cases": 5421,
"deaths": 310,
"suspects": 493,
"refuses": 89,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 26,
"uf": "PE",
"state": "Pernambuco",
"cases": 4507,
"deaths": 381,
"suspects": 89,
"refuses": 23,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 13,
"uf": "AM",
"state": "Amazonas",
"cases": 3635,
"deaths": 287,
"suspects": 18,
"refuses": 26,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 21,
"uf": "MA",
"state": "Maranhão",
"cases": 2105,
"deaths": 100,
"suspects": 125,
"refuses": 13,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 29,
"uf": "BA",
"state": "Bahia",
"cases": 2081,
"deaths": 70,
"suspects": 573,
"refuses": 36,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 32,
"uf": "ES",
"state": "Espírito Santo",
"cases": 1595,
"deaths": 47,
"suspects": 71,
"refuses": 21,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 15,
"uf": "PA",
"state": "Pará",
"cases": 1579,
"deaths": 86,
"suspects": 43,
"refuses": 23,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 31,
"uf": "MG",
"state": "Minas Gerais",
"cases": 1481,
"deaths": 58,
"suspects": 925,
"refuses": 104,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 42,
"uf": "SC",
"state": "Santa Catarina",
"cases": 1209,
"deaths": 42,
"suspects": 346,
"refuses": 47,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 41,
"uf": "PR",
"state": "Paraná",
"cases": 1140,
"deaths": 69,
"suspects": 400,
"refuses": 119,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 43,
"uf": "RS",
"state": "Rio Grande do Sul",
"cases": 1096,
"deaths": 34,
"suspects": 416,
"refuses": 330,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 53,
"uf": "DF",
"state": "Distrito Federal",
"cases": 1013,
"deaths": 26,
"suspects": 327,
"refuses": 107,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 24,
"uf": "RN",
"state": "Rio Grande do Norte",
"cases": 781,
"deaths": 40,
"suspects": 108,
"refuses": 22,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 16,
"uf": "AP",
"state": "Amapá",
"cases": 685,
"deaths": 19,
"suspects": 15,
"refuses": 0,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 52,
"uf": "GO",
"state": "Goiás",
"cases": 506,
"deaths": 25,
"suspects": 353,
"refuses": 55,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 27,
"uf": "AL",
"state": "Alagoas",
"cases": 501,
"deaths": 29,
"suspects": 43,
"refuses": 22,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 25,
"uf": "PB",
"state": "Paraíba",
"cases": 447,
"deaths": 46,
"suspects": 85,
"refuses": 11,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 14,
"uf": "RR",
"state": "Roraima",
"cases": 345,
"deaths": 3,
"suspects": 9,
"refuses": 0,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 11,
"uf": "RO",
"state": "Rondônia",
"cases": 328,
"deaths": 7,
"suspects": 61,
"refuses": 2,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 22,
"uf": "PI",
"state": "Piauí",
"cases": 297,
"deaths": 17,
"suspects": 12,
"refuses": 2,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 12,
"uf": "AC",
"state": "Acre",
"cases": 258,
"deaths": 11,
"suspects": 12,
"refuses": 0,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 51,
"uf": "MT",
"state": "Mato Grosso",
"cases": 247,
"deaths": 9,
"suspects": 45,
"refuses": 8,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 50,
"uf": "MS",
"state": "Mato Grosso do Sul",
"cases": 217,
"deaths": 7,
"suspects": 93,
"refuses": 26,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 28,
"uf": "SE",
"state": "Sergipe",
"cases": 153,
"deaths": 9,
"suspects": 15,
"refuses": 11,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 17,
"uf": "TO",
"state": "Tocantins",
"cases": 50,
"deaths": 2,
"suspects": 13,
"refuses": 0,
"datetime": "2020-04-25T20:34:01.065Z"
}
]
}
应该如何链接，以使对象“数据”仅显示其中具有“ uf” =“ PE”的对象？
答案 0 :(得分：0)
您不能像这样将查询字符串传递给JSON。但是，您可以使用过滤器根据键值过滤掉数据。就像这一行一样简单：
api.data.filter(a=>a.uf==code);
您可以将其存储在变量中。您可以将其传递给其他对象，等等。我在顶部使code为变量，因此您可以对其进行更改，并且该变量仍将起作用。自己尝试！
var code = "RJ";
const api = {
"data": [
{
"uid": 35,
"uf": "SP",
"state": "São Paulo",
"cases": 20004,
"deaths": 1667,
"suspects": 5334,
"refuses": 596,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 33,
"uf": "RJ",
"state": "Rio de Janeiro",
"cases": 6828,
"deaths": 615,
"suspects": 1254,
"refuses": 148,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 23,
"uf": "CE",
"state": "Ceará",
"cases": 5421,
"deaths": 310,
"suspects": 493,
"refuses": 89,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 26,
"uf": "PE",
"state": "Pernambuco",
"cases": 4507,
"deaths": 381,
"suspects": 89,
"refuses": 23,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 13,
"uf": "AM",
"state": "Amazonas",
"cases": 3635,
"deaths": 287,
"suspects": 18,
"refuses": 26,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 21,
"uf": "MA",
"state": "Maranhão",
"cases": 2105,
"deaths": 100,
"suspects": 125,
"refuses": 13,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 29,
"uf": "BA",
"state": "Bahia",
"cases": 2081,
"deaths": 70,
"suspects": 573,
"refuses": 36,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 32,
"uf": "ES",
"state": "Espírito Santo",
"cases": 1595,
"deaths": 47,
"suspects": 71,
"refuses": 21,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 15,
"uf": "PA",
"state": "Pará",
"cases": 1579,
"deaths": 86,
"suspects": 43,
"refuses": 23,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 31,
"uf": "MG",
"state": "Minas Gerais",
"cases": 1481,
"deaths": 58,
"suspects": 925,
"refuses": 104,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 42,
"uf": "SC",
"state": "Santa Catarina",
"cases": 1209,
"deaths": 42,
"suspects": 346,
"refuses": 47,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 41,
"uf": "PR",
"state": "Paraná",
"cases": 1140,
"deaths": 69,
"suspects": 400,
"refuses": 119,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 43,
"uf": "RS",
"state": "Rio Grande do Sul",
"cases": 1096,
"deaths": 34,
"suspects": 416,
"refuses": 330,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 53,
"uf": "DF",
"state": "Distrito Federal",
"cases": 1013,
"deaths": 26,
"suspects": 327,
"refuses": 107,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 24,
"uf": "RN",
"state": "Rio Grande do Norte",
"cases": 781,
"deaths": 40,
"suspects": 108,
"refuses": 22,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 16,
"uf": "AP",
"state": "Amapá",
"cases": 685,
"deaths": 19,
"suspects": 15,
"refuses": 0,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 52,
"uf": "GO",
"state": "Goiás",
"cases": 506,
"deaths": 25,
"suspects": 353,
"refuses": 55,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 27,
"uf": "AL",
"state": "Alagoas",
"cases": 501,
"deaths": 29,
"suspects": 43,
"refuses": 22,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 25,
"uf": "PB",
"state": "Paraíba",
"cases": 447,
"deaths": 46,
"suspects": 85,
"refuses": 11,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 14,
"uf": "RR",
"state": "Roraima",
"cases": 345,
"deaths": 3,
"suspects": 9,
"refuses": 0,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 11,
"uf": "RO",
"state": "Rondônia",
"cases": 328,
"deaths": 7,
"suspects": 61,
"refuses": 2,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 22,
"uf": "PI",
"state": "Piauí",
"cases": 297,
"deaths": 17,
"suspects": 12,
"refuses": 2,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 12,
"uf": "AC",
"state": "Acre",
"cases": 258,
"deaths": 11,
"suspects": 12,
"refuses": 0,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 51,
"uf": "MT",
"state": "Mato Grosso",
"cases": 247,
"deaths": 9,
"suspects": 45,
"refuses": 8,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 50,
"uf": "MS",
"state": "Mato Grosso do Sul",
"cases": 217,
"deaths": 7,
"suspects": 93,
"refuses": 26,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 28,
"uf": "SE",
"state": "Sergipe",
"cases": 153,
"deaths": 9,
"suspects": 15,
"refuses": 11,
"datetime": "2020-04-25T20:34:01.065Z"
},
{
"uid": 17,
"uf": "TO",
"state": "Tocantins",
"cases": 50,
"deaths": 2,
"suspects": 13,
"refuses": 0,
"datetime": "2020-04-25T20:34:01.065Z"
}
]
};
var filtered = api.data.filter(a=>a.uf==code);
console.log(filtered);